Have you upped any voltages at stock speeds to get your ram running at 3200? I have the same ram as yours, but have had the pc freeze once and then not boot (until cleared CMOS) when I was running XMP 3200.

Edit: Don't know if XMP does it, but I manually upped the DRAM voltage to 1.35v. Seems to be stable so far at 3200.

nope with the taichi its
go into the bios
manual
punch in 3900
punch in 1.25
change offset to llc 3 (i think that is different on other boards...it seems to be backwards llc 5 on this is 1 or off)
punch in xmp profile(only one there )
ups the volts to 1.35 and done

Die temp maxes out at about 62deg, with 1500rpm fans on the H115i only getting to 660rpm (CPU1 fan is the radiator fans).

There is a bug with this MSI X399 board too. On reboot, the system doesn't boot until you turn it off again or hit restart button 1 or 2 times, then it boots again. It's a bit of a pain. Others have the same issue. https://forum-en.msi.com/index.php?topic=291025.0

It's annoying enough for me, I just ordered a Asus ROG Zenith board, may have it by the end of next week (ebay special again, over $100 cheaper after discount than other stores). I'll try and RMA the MSI if they haven't fixed it with a bios update by then.

I'm holding out for a cheap Enermax full IHS AIO or the Noctua TR4 coolers but they are rarer than hens teeth - might have to go with an asetek. Will go custom loop in about a month after I knock out some work.

Initially I was going to do the same, but figured if they are already binned at 2%, re-binning isn't going to give us much. Seems to be a cap at 4.2GHz...

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This unfortunately isn't quite the case, of the two I know of there seems to be a solid 100-150mhz difference in achievable clock on identical hardware. If you're after guaranteed 4Ghz+ daily stable clocks I would recommend SL.

with 32 threads and 16 cores to play with there is plenty to test and work out what is the optimal configuration.

Im using SLI, each 16x slot is connected to one die on the CPU meaning that any PCIe traffic between the cards must traverse the infinity fabric. Fast communication between GPU's is critical to achieving good SLI scaling - i'd hope the SLI bridge does most of this but at least in the case of xDMA the PCIe bus being fat as fuck is important in multi-gpu setups. Having cache/memory accessed across the same interconnect as the GPU's should have some impact on performance but I havnt yet measured it.

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overclocking:

Ive experimented with very high voltages, up to 1.67v and the highest clocks ive managed to pass 3dmark at are 4125mhz - I have a 'theroy' that there is a 'curve' of stability where adding voltage adds stability, up to a point where thermal/current limits start to rock the boat in a very uncool way... but I am yet to properly test various voltages to find their max stable clocks. Im also not convinced LLC/current limit settings are working correclty on this board (yet...)

Intel XTU was great for showing throttling and I am yet to find something similar for AMD so working out why its not stable is like running around in the dark.

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memory:

I have 4x8gb d-die 3333cl16 - using 1.4v dram and 1.35v SOC I can post into windows on 3200mhz but memtest shows errors after a few mins. 2933mhz takes longer to show errros. 2800mhz is error free and ive been able to lower SOC to 1.25v (i havnt tried lower)

the h115i is doing just fine
3.9 @ 1.25 and 3200 ram and after a few loops of real bench 71 was the highest it peaks most times it is around 65 topped out and runs 50/55 normal use games etc.
handbrake takes it to 65 at the upper limit.

from the *other forum* he is stalking me from ...

in regards to yur setup which is quite a bit more hardcore than mine with those cards....gamers mode*may* have more of a difference especially with sli.
but i still think no.

as for the ram....next i,m going to try 3466....crazy right i know but hey why not i,m pretty sure apart from that one instance of fail which could have been something else triggering it and still only running 1.35 volts i believe i can get there.

seems the 1900x has dropped
one store has it for $799 but i can see it being a little cheaper elsewhere that puts it squarely dollar for dollar against the 7820x(but saying that the boards are still around $100 dearer than intels)

Intel XTU was great for showing throttling and I am yet to find something similar for AMD so working out why its not stable is like running around in the dark.

Click to expand...

XTU is just running Prime95 after its 2 second "benchmark". So maybe use Prime95 (I think version 28.10 was the one...) for tests such as this. Also Maybe Timur Born's threads in the massive C6H thread on OCN about sense mi/sense skew/thermal shutdown/throttling on Ryzen maybe relevant.

seems the 1900x has dropped
one store has it for $799 but i can see it being a little cheaper elsewhere that puts it squarely dollar for dollar against the 7820x(but saying that the boards are still around $100 dearer than intels)

i know...right there is that dude with the 2 1080ti's and the 980ti...crammed into that case try that on a 299

i, m still tossing up how to cool this thing without going bankrupt
at the moment keeping it under 70 for normal heavy use isn't an issue but after looking at the other thread with the noctuas i decided to run prime 95...that's scary(small ffts) normal mode was a doddle.

i, m also tossing up on getting a nvme drive...the ssd runs just fine but ...i want the faster stuff now

The x399 motherboard prices are still pushing the overall cost of a 1900x system above the cost of a 7820x system. But you know... 28 pcie lanes... *spits*

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Seems weird, must be an NDA on reviews that haven't yet passed.

AMD would be keen to get these out and about. The inital rush of x399 seems to have faded, now. Stock levels of mobos seem ok. There are coolers available now.

I would imagine they will have a regular addition to the thread ripper line up every 1-2 months. A non x 12 and 16 cores are I think highly likely, that is still highly profitable price points for AMD and market share and platforms they want to hit.

Gotta say, I think Asrock have done well with the AM4 and threadripper lineup. Asrock has some compelling products in both AM4 and TR4. The Tachi seems to have the important features at a reasonable price.

NDA on the 1900x is meant to lift in about 7h 40mins form this post so will be very interesting to see, i think its just going to be exactly like if you took a 1950x or a 1920x and disabled cores to make them be 4/4

much like how people disabling cores on the 1800x matched real world performance of the lower skews